Stub End Dimensions - Complete Reference Guide

Stub ends are essential pipe fittings used in conjunction with lap joint flanges to create flexible, reusable connections in piping systems. These components are manufactured according to strict dimensional standards, primarily ASME B16.9 and MSS SP-43, ensuring compatibility and reliability across industrial applications.

Available in both long and short patterns, stub ends accommodate various piping requirements from 1/2" to 48" nominal pipe sizes. The long pattern stub ends follow ASME B16.9 specifications, while short pattern variants comply with MSS SP-43 standards, each serving specific installation needs and space constraints.

Common materials include stainless steel (304, 316L), carbon steel (A234 WPB), and various alloy steels, with wall thickness options ranging from Schedule 5S to Schedule 80S. Type A stub ends are used with standard lap joint flanges, while Type B variants accommodate heavy-duty applications requiring enhanced structural integrity.

Understanding proper stub end dimensions is crucial for engineers, procurement specialists, and installation teams to ensure correct fit, optimal performance, and compliance with industry codes. The dimensional data includes critical measurements such as hub length, lap thickness, bore diameter, and overall length specifications.

Our comprehensive dimension charts below provide detailed specifications for all standard sizes, materials, and pressure classes to assist in proper selection and procurement of stub end fittings for your piping projects.